A045111 Numbers whose base-4 representation contains no 1's and exactly two 3's.

15, 47, 51, 59, 60, 62, 143, 175, 179, 187, 188, 190, 195, 203, 204, 206, 227, 235, 236, 238, 240, 242, 248, 250, 527, 559, 563, 571, 572, 574, 655, 687, 691, 699, 700, 702, 707, 715, 716, 718, 739, 747, 748, 750, 752, 754, 760

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Mathematica

Select[Range[1000], DigitCount[#, 4, 1]==0&&DigitCount[#, 4, 3]==2&] (* Harvey P. Dale, May 06 2013 *)

Crossrefs

Cf. A007090.

Sequence in context: A042007 A269013 A041438 * A031451 A105572 A143031

Adjacent sequences: A045108 A045109 A045110 * A045112 A045113 A045114

Keyword

nonn,base

Author

Clark Kimberling

Status

approved